# Ramp Horizontal A left-to-right linear value ramp (gradient) generator. ## Parameter Types **Ramp Horizontal (float):** |Input |Type | |---------------------|--------| |`Left` |Float | |`Right` |Float | |`Texture Coordinates`|Vector2f| |Output|Type | |------|-----| |`Out` |Float| **Ramp Horizontal (vector4f):** |Input |Type | |---------------------|--------| |`Left` |Vector4f| |`Right` |Vector4f| |`Texture Coordinates`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector4f| **Ramp Horizontal (vector2h):** |Input |Type | |---------------------|--------| |`Left` |Vector2h| |`Right` |Vector2h| |`Texture Coordinates`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector2h| **Ramp Horizontal (vector4h):** |Input |Type | |---------------------|--------| |`Left` |Vector4h| |`Right` |Vector4h| |`Texture Coordinates`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector4h| **Ramp Horizontal (vector3f):** |Input |Type | |---------------------|--------| |`Left` |Vector3f| |`Right` |Vector3f| |`Texture Coordinates`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector3f| **Ramp Horizontal (vector2f):** |Input |Type | |---------------------|--------| |`Left` |Vector2f| |`Right` |Vector2f| |`Texture Coordinates`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector2f| **Ramp Horizontal (color4f):** |Input |Type | |---------------------|-------------| |`Left` |Color4| |`Right` |Color4| |`Texture Coordinates`|Vector2f | |Output|Type | |------|-------------| |`Out` |Color4| **Ramp Horizontal (color3f):** |Input |Type | |---------------------|-------------| |`Left` |Color3| |`Right` |Color3| |`Texture Coordinates`|Vector2f | |Output|Type | |------|-------------| |`Out` |Color3| **Ramp Horizontal (half):** |Input |Type | |---------------------|--------| |`Left` |Half | |`Right` |Half | |`Texture Coordinates`|Vector2f| |Output|Type| |------|----| |`Out` |Half| **Ramp Horizontal (vector3h):** |Input |Type | |---------------------|--------| |`Left` |Vector3h| |`Right` |Vector3h| |`Texture Coordinates`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector3h| ## Parameter descriptions - `Left`: The left value of the interpolation. - `Right`: The right value of the interpolation. - `Texture Coordinates`: The 2D coordinate at which the data is read in order to map the texture onto a surface. The default is to use the current UV coordinates, in which U is the horizontal axis and V is the vertical axis. ## Discussion This node uses interpolation to create a horizontal ramp or gradient from two values. Any point within the output ramp is a mix of the two values. A given point is more similar to the value that its horizontal position is closer to. Below is a an example of a simple node graph that uses `Ramp Horizontal` to create a color gradient:  The image below shows the resulting texture, along with the color values on either side:  --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)